Home / 18,754.47-28,131.12-7,658.28

Finding the Fourth Proportional to 18,754.47, 28,131.12 and 7,658.28

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Solution

The fourth proportional to 18,754.47, 28,131.12 and 7,658.28 is: 11,487.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,754.47 : 28,131.12 = 7,658.28 : x
  2. Step 2: Convert to fraction form
    18,754.47/28,131.12 = 7,658.28/x
  3. Step 3: Cross multiply
    18,754.47x = 28,131.12 × 7,658.28
  4. Step 4: Simplify right side
    18,754.47x = 215,435,993.67
  5. Step 5: Solve for x
    x = 215,435,993.67/18,754.47
  6. Step 6: Final answer
    x = 11,487.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.